the reason obama's yes has an asterisk -- under obama's watch, concealed weapons are now allowed on amtrak trains and in national parks. >> he's continued to pay lip service to those things but he hasn't shown real leadership in pursuing those changes. >> yes, background checks have gotten more thorough under president obama. but the big problem remains gun shows and internet. specifically unlicensed dealers selling firearms to buyers with no background check needed. president obama has supported closing the gun show loophole in the past. but the white house says his focus now is on existing laws. governor romney says no to any further regulation of gun shows. >> there's no particular change in law whothat's going to keep people who are going to do harm to do harm. >> we should do anything and everything to keep criminals from purchasing weapons. >> reporter: so obama says he wants tougher gun laws, little was done during his first term. republican governor romney has said he's done more in the past. . >>> we're looking at some of the key issues that could decide the presidential election,